A deal was a deal. She wanted them to have a baby, so he was allowed to cum in her for the days around her pregnancy. Of course she made him ruin them all, in her, pushing in and staying deep as he jetted his seed in her fertile womb.
But he was caged the rest of the month, and when she did finally get pregnant, he’d share the experience, not being let out, until the baby arrived.
Much to her delight, she got pregnant the first time they tried! Congratulations to the happy couple!